Liberal Senator and former veterinarian Chris Back says draft laws he introduced to Parliament would have led to faster action against animal cruelty in the greyhound industry.

The Liberal backbencher last week tabled a private member's bill which would force animal welfare activists to immediately hand over evidence of alleged animal cruelty.

Critics of the proposed legislation have said it will silence whistleblowers, but Senator Back said it would have resulted in swifter action against the live baiting cases exposed in this week's Four Corners investigation.

"That goes to the absolute nub of my legislation," he said.

"If the RSPCA had been provided with that material in November of last year they could have done in November what they actually apparently did last Wednesday.

"What my legislation, or my bill proposes is two things; one - there be a minimal delay between someone observing and filming something and it being reported, and secondly that they act within the law."

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